code: def __init__(self):
      self.success = 0
      self.fail = 0
      self.succ_ps = DynamicBucketMerge(2, 10)
      self.exec_ps = DynamicBucketMerge(2, 10)
      self.succ_times = []
      self.exec_times = []
      self.succ_time_ps = DynamicBucketMerge(2, 10)
      self.exec_time_ps = DynamicBucketMerge(2, 10)
      self.client_busy = 0
      self.exceptions = defaultdict(list)
      self._sess_start_time = 0
      self._sess_stop_time = 0
  
imports: import asyncio
  import math
  import time
  from collections import defaultdict
  from tabulate import tabulate
label_desc: Use image node_id 1 to create a new Stat object  with example: obj = Stat()